def setUp(self):
self.eulerian4_circuit = UndirectedAdjList()
self.eulerian4_circuit.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_circuit.make_neighbor("n1", "n2")
self.eulerian4_circuit.make_neighbor("n1", "n3")
self.eulerian4_circuit.make_neighbor("n2", "n4")
self.eulerian4_circuit.make_neighbor("n3", "n4")
self.eulerian4_path = UndirectedAdjList()
self.eulerian4_path.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_path.make_neighbor("n1", "n2")
self.eulerian4_path.make_neighbor("n1", "n3")
self.eulerian4_path.make_neighbor("n2", "n4")
self.eulerian4_path.make_neighbor("n4", "n3")
self.eulerian4_path.make_neighbor("n3", "n2")
self.star_circuit = UndirectedAdjList()
self.star_circuit.add_nodes(["n1", "n2", "n3", "n4", "n5"])
self.star_circuit.make_neighbor("n1", "n2")
self.star_circuit.make_neighbor("n1", "n4")
self.star_circuit.make_neighbor("n3", "n5")
self.star_circuit.make_neighbor("n3", "n2")
self.star_circuit.make_neighbor("n4", "n5")
self.star_circuit.make_neighbor("n4", "n1")
self.line = UndirectedAdjList()
self.line.add_nodes(["n1", "n2", "n3", "n4"])
self.line.make_neighbor("n1", "n2")
self.line.make_neighbor("n2", "n3")
self.line.make_neighbor("n3", "n4")
def setUp(self):
self.eulerian4_circuit = UndirectedAdjList()
self.eulerian4_circuit.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_circuit.make_neighbor("n1", "n2")
self.eulerian4_circuit.make_neighbor("n1", "n3")
self.eulerian4_circuit.make_neighbor("n2", "n4")
self.eulerian4_circuit.make_neighbor("n3", "n4")
self.eulerian4_path = UndirectedAdjList()
self.eulerian4_path.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_path.make_neighbor("n1", "n2")
self.eulerian4_path.make_neighbor("n1", "n3")
self.eulerian4_path.make_neighbor("n2", "n4")
self.eulerian4_path.make_neighbor("n4", "n3")
self.eulerian4_path.make_neighbor("n3", "n2")
self.star_circuit = UndirectedAdjList()
self.star_circuit.add_nodes(["n1", "n2", "n3", "n4", "n5"])
self.star_circuit.make_neighbor("n1", "n2")
self.star_circuit.make_neighbor("n1", "n4")
self.star_circuit.make_neighbor("n3", "n5")
self.star_circuit.make_neighbor("n3", "n2")
self.star_circuit.make_neighbor("n4", "n5")
self.star_circuit.make_neighbor("n4", "n1")
self.line = UndirectedAdjList()
self.line.add_nodes(["n1", "n2", "n3", "n4"])
self.line.make_neighbor("n1", "n2")
self.line.make_neighbor("n2", "n3")
self.line.make_neighbor("n3", "n4")
class EulerianTests(unittest.TestCase):
def setUp(self):
self.eulerian4_circuit = UndirectedAdjList()
self.eulerian4_circuit.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_circuit.make_neighbor("n1", "n2")
self.eulerian4_circuit.make_neighbor("n1", "n3")
self.eulerian4_circuit.make_neighbor("n2", "n4")
self.eulerian4_circuit.make_neighbor("n3", "n4")
self.eulerian4_path = UndirectedAdjList()
self.eulerian4_path.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_path.make_neighbor("n1", "n2")
self.eulerian4_path.make_neighbor("n1", "n3")
self.eulerian4_path.make_neighbor("n2", "n4")
self.eulerian4_path.make_neighbor("n4", "n3")
self.eulerian4_path.make_neighbor("n3", "n2")
self.star_circuit = UndirectedAdjList()
self.star_circuit.add_nodes(["n1", "n2", "n3", "n4", "n5"])
self.star_circuit.make_neighbor("n1", "n2")
self.star_circuit.make_neighbor("n1", "n4")
self.star_circuit.make_neighbor("n3", "n5")
self.star_circuit.make_neighbor("n3", "n2")
self.star_circuit.make_neighbor("n4", "n5")
self.star_circuit.make_neighbor("n4", "n1")
self.line = UndirectedAdjList()
self.line.add_nodes(["n1", "n2", "n3", "n4"])
self.line.make_neighbor("n1", "n2")
self.line.make_neighbor("n2", "n3")
self.line.make_neighbor("n3", "n4")
def test_eulerian_circuit(self):
self.assertTrue(is_eulerian_circuit(self.eulerian4_circuit))
self.assertFalse(is_eulerian_circuit(self.eulerian4_path))
self.assertTrue(is_eulerian_circuit(self.star_circuit))
self.assertFalse(is_eulerian_circuit(self.line))
# TODO Characterize Eulerian circuits for unit test checking
present_nodes = set(["n1", "n2", "n3", "n4"])
circuit = eulerian(circuit_start_node, is_eulerian_circuit, self.eulerian4_circuit)
print(str(circuit))
foo = present_nodes == set(circuit)
self.assertTrue(foo)
self.assertEqual(None, eulerian(circuit_start_node,
is_eulerian_circuit, self.eulerian4_circuit))
def test_eulerian_path(self):
self.assertTrue(is_eulerian_path(self.eulerian4_path))
self.assertFalse(is_eulerian_path(self.star_circuit))
self.assertFalse(is_eulerian_path(self.eulerian4_circuit))
self.assertTrue(is_eulerian_path(self.line))
# Test determining actual Eulerian path
# TODO Better characterization of Eulerian paths.
eulerianpath = [
set(["n2", "n1"]),
set(["n1", "n3"]),
set(["n3", "n4"]),
set(["n4", "n2"]),
set(["n2", "n3"]),
]
self.assertEqual(eulerianpath, eulerian(path_start_node,
is_eulerian_path, self.eulerian4_path))
self.assertEqual(None, eulerian(path_start_node,
is_eulerian_path, self.eulerian4_circuit))
self.assertEqual(None, eulerian(path_start_node,
is_eulerian_path, self.star_circuit))
# Destroy the Eulerian path in eulerian4_path
self.eulerian4_path.make_neighbor("n1", "n4")
self.assertFalse(is_eulerian_path(self.eulerian4_path))
class EulerianTests(unittest.TestCase):
def setUp(self):
self.eulerian4_circuit = UndirectedAdjList()
self.eulerian4_circuit.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_circuit.make_neighbor("n1", "n2")
self.eulerian4_circuit.make_neighbor("n1", "n3")
self.eulerian4_circuit.make_neighbor("n2", "n4")
self.eulerian4_circuit.make_neighbor("n3", "n4")
self.eulerian4_path = UndirectedAdjList()
self.eulerian4_path.add_nodes(["n1", "n2", "n3", "n4"])
self.eulerian4_path.make_neighbor("n1", "n2")
self.eulerian4_path.make_neighbor("n1", "n3")
self.eulerian4_path.make_neighbor("n2", "n4")
self.eulerian4_path.make_neighbor("n4", "n3")
self.eulerian4_path.make_neighbor("n3", "n2")
self.star_circuit = UndirectedAdjList()
self.star_circuit.add_nodes(["n1", "n2", "n3", "n4", "n5"])
self.star_circuit.make_neighbor("n1", "n2")
self.star_circuit.make_neighbor("n1", "n4")
self.star_circuit.make_neighbor("n3", "n5")
self.star_circuit.make_neighbor("n3", "n2")
self.star_circuit.make_neighbor("n4", "n5")
self.star_circuit.make_neighbor("n4", "n1")
self.line = UndirectedAdjList()
self.line.add_nodes(["n1", "n2", "n3", "n4"])
self.line.make_neighbor("n1", "n2")
self.line.make_neighbor("n2", "n3")
self.line.make_neighbor("n3", "n4")
def test_eulerian_circuit(self):
self.assertTrue(is_eulerian_circuit(self.eulerian4_circuit))
self.assertFalse(is_eulerian_circuit(self.eulerian4_path))
self.assertTrue(is_eulerian_circuit(self.star_circuit))
self.assertFalse(is_eulerian_circuit(self.line))
# TODO Characterize Eulerian circuits for unit test checking
present_nodes = set(["n1", "n2", "n3", "n4"])
circuit = eulerian(circuit_start_node, is_eulerian_circuit,
self.eulerian4_circuit)
print(str(circuit))
foo = present_nodes == set(circuit)
self.assertTrue(foo)
self.assertEqual(
None,
eulerian(circuit_start_node, is_eulerian_circuit,
self.eulerian4_circuit))
def test_eulerian_path(self):
self.assertTrue(is_eulerian_path(self.eulerian4_path))
self.assertFalse(is_eulerian_path(self.star_circuit))
self.assertFalse(is_eulerian_path(self.eulerian4_circuit))
self.assertTrue(is_eulerian_path(self.line))
# Test determining actual Eulerian path
# TODO Better characterization of Eulerian paths.
eulerianpath = [
set(["n2", "n1"]),
set(["n1", "n3"]),
set(["n3", "n4"]),
set(["n4", "n2"]),
set(["n2", "n3"]),
]
self.assertEqual(
eulerianpath,
eulerian(path_start_node, is_eulerian_path, self.eulerian4_path))
self.assertEqual(
None,
eulerian(path_start_node, is_eulerian_path,
self.eulerian4_circuit))
self.assertEqual(
None, eulerian(path_start_node, is_eulerian_path,
self.star_circuit))
# Destroy the Eulerian path in eulerian4_path
self.eulerian4_path.make_neighbor("n1", "n4")
self.assertFalse(is_eulerian_path(self.eulerian4_path))
